Complain about incorrect this/super constructor initializers.

pkg/front_end/lib/src/fasta/kernel/kernel_procedure_builder.dart

 // Copyright (c) 2016, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library fasta.kernel_procedure_builder;
 
 import 'package:kernel/ast.dart'
     show
         Arguments,
         AsyncMarker,
@@ skipping 37 matching lines @@
         ConstructorReferenceBuilder,
         FormalParameterBuilder,
         KernelFormalParameterBuilder,
         KernelLibraryBuilder,
         KernelTypeBuilder,
         KernelTypeVariableBuilder,
         LibraryBuilder,
         MetadataBuilder,
         ProcedureBuilder,
         TypeVariableBuilder,
+        isRedirectingGenerativeConstructorImplementation,
         memberError;
 
 abstract class KernelFunctionBuilder
     extends ProcedureBuilder<KernelTypeBuilder> {
   final String nativeMethodName;
 
   FunctionNode function;
 
   Statement actualBody;
 
@@ skipping 172 matching lines @@
     }
     return procedure;
   }
 
   Procedure get target => procedure;
 }
 
 // TODO(ahe): Move this to own file?
 class KernelConstructorBuilder extends KernelFunctionBuilder {
   final Constructor constructor;
+
   final int charOpenParenOffset;
 
   bool hasMovedSuperInitializer = false;
 
   SuperInitializer superInitializer;
 
   RedirectingInitializer redirectingInitializer;
 
   KernelConstructorBuilder(
       List<MetadataBuilder> metadata,
@@ skipping 14 matching lines @@
             compilationUnit, charOffset, nativeMethodName);
 
   bool get isInstanceMember => false;
 
   bool get isConstructor => true;
 
   AsyncMarker get asyncModifier => AsyncMarker.Sync;
 
   ProcedureKind get kind => null;
 
+  bool get isRedirectingGenerativeConstructor {
+    return isRedirectingGenerativeConstructorImplementation(constructor);
+  }
+
   Constructor build(LibraryBuilder library) {
     if (constructor.name == null) {
       constructor.function = buildFunction(library);
       constructor.function.parent = constructor;
       constructor.function.fileOffset = charOpenParenOffset;
       constructor.function.fileEndOffset = constructor.fileEndOffset;
       constructor.isConst = isConst;
       constructor.isExternal = isExternal;
       constructor.name = new Name(name, library.target);
     }
@@ skipping 62 matching lines @@
         }
       }
       initializers.add(initializer..parent = constructor);
       initializers.add(superInitializer);
       return;
     }
     initializers.add(initializer);
     initializer.parent = constructor;
   }
 }